We supply bulk, wholesale large volume of planed regularised (Reg) C24 Graded Stress Structural Graded Softwood with eased edges, carcassing joists for construction. The visual quality is considered premium as its selected both for strength and visual appearance from slow grown
Russian, Nordic and Scandinavia. We can supply it pressure impregnated with Tanalith E, Tanatone or equivalent Tanalised UC3 in Green or Brown tones, or clear Vac Vac – Protim / Vacsol etc. We can arrange for full packs or mixed loads to be delivered throughout the UK and Ireland.Please find more information on our downloads section.
All our timber is FSC Chain of Custody (CoC) and manufactured in our factory with ISO 9001 Quality Management Standard Certification.
All our timber meets the Construction Products Regulation (CPR) i.e CE Marking and Standards: planed regularised Strength Graded timber / carcassing is C24 to BS EN 14081-1:2016 and BS EN 338: 2016, BS 4978, BS 336
The common sizes we supply include the following;-
|Nom. Nominal Size Metric in mm||Nom. Nominal Size Imperial in inches (“)||Fin. Finished Size Metric in mm||Species
WW = Whitewood, Spruce
RW = Redwood, Pine
LH = Siberian Larch
|Certification Chain of Custody
Moreover, Strength Graded Class
|Number of pieces Pces in a bulk pack||Shipment Prompt
To order for preservative treatment
Planed Smooth and 3mm 4 rads ( radius)
|50x50mm||2×2||45x45mm||WW & RW||FSC||352||Prompt||Planed smooth with eased edges|
|50x75mm||3×2||45x70mm||WW & RW||FSC & C24||224||Prompt||Planed smooth with eased edges|
|50x100mm||4×2||45x95mm||WW & RW||FSC & C24||176||Prompt||Planed smooth with eased edges|
|50x125mm||5×2||45x120mm||WW||FSC & C24||144||Prompt||Planed smooth with eased edges|
|50x150mm||6×2||45x145mm||WW & RW||FSC & C24||112||Prompt||Planed smooth with eased edges|
|50x175mm||7×2||45x170mm||WW||FSC & C24||96||Prompt||Planed smooth with eased edges|
|50x200mm||8×2||45x195mm||WW||FSC & C24||80||Prompt||Planed smooth with eased edges|
|50x225mm||9×2||45x220mm||WW||FSC & C24||80||Prompt||Planed smooth with eased edges|
|50x245mm||10×2||45x245mm||WW||FSC & C24||64||Prompt||Planed smooth with eased edges|
C16 or C24 Timber
C16 and C24 are the most common used softwood timbers within the UK. They are widely used in both domestic and commercial projects, but with the two timbers ideally suited to different and specific loads, it can be difficult to know whether you are using the best timber for your construction. Here we have a rundown of the qualities of the two timbers to help you evaluate the whether C16 or C24 timber selection for your project.
The strength of timber is evaluated after the wood has been kiln dried to below 20% moisture content. The timber goes through an automated or visual grading line where various measurements are taken that indicate the strength of the wood, with physical defects such as knots and pinworm holes lowering the strength of the timber. The ‘C’ grading simply stands for conifer, the variety of tree the timber is made from while the number indicates the strength, with the specific measurements allowed outlined in the table below:
|Bending parallel to grain (N/mm2)||5.3||7.5|
|Tension parallel to grain (N/mm2)||3.2||4.5|
|Compression parallel to grain (N/mm2)||1.8||7.9|
|Compression perpendicular to grain (N/mm2)||2.2-1.7||2.4-1.9|
|Shear parallel to grain (N/mm2)||0.67||0.71|
|Modulus of elasticity mean (N/mm2)||8,800||10,800|
|Modulus of elasticity minimum (N/mm2)||5,800||7,200|
|Characteristic density (kg/m5)||310||350|
|Average density (kg/m5)||370||420|
If you would like more information on the guidelines for the grading of timber, the standards BS EN 14081-1:2016 and BS EN 338: 2016, BS 4978, BS 336 or BS EN 1995-1-1:2004+A2:2014 which has replaced BS5268-2:2002 have all the information you need.
C24 boards have fewer defects than C16 graded timber and the timber is therefore stronger and more resilient than C16 boards. You will also find that C24 boards have a more uniformed and neat appearance as there are fewer physical imperfections on the surface of the board. C24s are not as widely used as C16 as the timber is much more expensive because the demand for high standard boards means that there are a lot of boards rejected, so you gain less timber from the same amount of wood as you would C16 boards. Generally, C24 boards are mainly imported from slower growing timber regions.
It is impossible to state categorically that one timber grade is better than the other as the preferred timber for your project comes down to what features are important to you.
With regards to strength and load carrying, C24 boards are clearly superior to C16, however, C16 timber is strong enough for most projects and will certainly meet your performance requirements at a much cheaper cost than C24 boards.
If the aesthetic appeal of your timber is important – if you would like to leave the boards unvarnished, for example – then again, C24 is more beneficial than C16 boards. The main benefit of C24 over C16 boards in instances where both boards are adequate is that C24 boards can have a wider rafter centre or a smaller deck board section, giving you more choice in the finished aesthetic.
C24 timbers mainly being reserved for projects such as balconies and bridges, where aesthetics and strength are important.
Please visit our product videos page for more information on timber cladding, flooring, decking, mouldings/profiles, fire treatment – product, manufacture and installation information.